if (document.images) {            // Active Images
            imgBiecon = new Image();      
            imgBiecon.src = "biencol_on_e.jpg";
  	    imgEnglon = new Image();      
            imgEnglon.src = "engl_on_e.jpg";
  	    imgIngron = new Image();      
            imgIngron.src = "ingr_on_e.jpg";
	    imgInston = new Image();      
            imgInston.src = "inst_on_e.jpg";		
	    imgInfoon = new Image();      
            imgInfoon.src = "info_on_e.jpg";
	    imgPropon = new Image();      
            imgPropon.src = "prop_on_e.jpg";     
	    imgDoceon = new Image();      
            imgDoceon.src = "doce_on_e.jpg";
	    imgEquion = new Image();      
            imgEquion.src = "equi_on_e.jpg";
	    imgEducon = new Image();      
            imgEducon.src = "educ_on_e.jpg";
	    imgApoyon = new Image();      
            imgApoyon.src = "apoy_on_e.jpg";	  

	    imgBiecoff = new Image();      
            imgBiecoff.src = "biencol_off_e.jpg";
	    imgEngloff = new Image();      
	    imgEngloff.src = "engl_off_e.jpg";
	    imgIngroff = new Image();      
	    imgIngroff.src = "ingr_off_e.jpg";
	    imgInstoff = new Image();      
	    imgInstoff.src = "inst_off_e.jpg";		
	    imgInfooff = new Image();      
	    imgInfooff.src = "info_off_e.jpg";
	    imgPropoff = new Image();      
	    imgPropoff.src = "prop_off_e.jpg";     
	    imgDoceoff = new Image();      
	    imgDoceoff.src = "doce_off_e.jpg";
	    imgEquioff = new Image();      
	    imgEquioff.src = "equi_off_e.jpg";
	    imgEducoff = new Image();      
	    imgEducoff.src = "educ_off_e.jpg";
	    imgApoyoff = new Image();      
	    imgApoyoff.src = "apoy_off_e.jpg";	  



        }

// Function to 'activate' images.
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}

// Function to 'activate' images.
function imgClick(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "click.src");
        }
}